Cast-metal brake-beam.



c. H. WILLIAMS JR. CAST METAL BRAKE BEAM.

APPLICATION FILED MAY 23,1913.

HIE N-ORRIS' PETERS cu. Pmnn 1 Irma. WAbHINuTUN. n I.

Patented Aug. 11, 1914.

STATES PAIN @15 ICE.

CHARLES H'. WILLIAMS, JR., OF

EQUIPMENT COMPANY, OF

CAST-METAL BRAKE-BEAM.

To all whom it may concern Be it known that I, CHARLES H. WIL- LIAMS, Jr., a citizen of the United States, residing at the city of Chicago, State of Illinois, have invented a certain new and useful Improvement in Cast-Metal Brake- Beams, of which the following is a full, clear, and exact description, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings,

' forming part of this specification,inwhicl1- F igure 1 is a plan view of my improved cast metal brake beam. Fig. 2 is a side elevational view of the strut.

This invention relates to a new and useful improvement in cast metal brake beams, the object being to construct a cast metal brake beam in which the parts most liable to wear may be renewed. The economy of integral cast metal beams is seriously effected by the wear of the pin holes and the trunnion ends on which the adjustable heads are mounted. Wear at these points will greatly increase the cost of rip-keep and seriously effect the efficiency of the beam by requiring a greater stroke of the piston in the air cylinder.

In the drawings, I have shown a cast metal beam whose tension and compression members are I-shaped in section, but it is obvious that other well known forms may be employed. Near the junction of the tension member and the trunnion, I prefer to increase the thickness of the metal as indicated at 1 so that in the event of the shoe and head wearing down to such an extent that the wheel flanges cut into the beam, the beam will not be weakened at thispoint. If desired, the beam could be curved inwardly at the point of probable flange grinding so as to avoid such cutting action. The beam is preferably reinforced between the trunnion and strut by means of a cross connecting member 2 which adds materially to the Specification of Letters Patent.

Application filed May 23, 1913.

Patented Aug. Ill, 1914. Serial No. 769,457.

rigidity of the structure. The strut 3 is cast integral with the compression and tension members, and while I have shown the opening for the brake lever being disposed at an angle of 90 in the drawings, it is obvious that in practice the angularity of the brake lever opening would be as called for by the M. C. B. requiremnts. To enable the pin hole opening to be renewed in the event that the walls of the same become worn in service, I provide the strut with a pocket, open at one side, which pocket is formed with interlocking ribs 4. 5 is a box shaped casting having grooves near its ends to cooperate with the ribs 4-, said box shaped casting also having bossed pin hole openings 6 which are received in semicircular recesses in the walls of the strut, the walls of said recesses being thickened for the purpose of strengthening the bossed pin hole openings as shown in Figs. 1 and 2. Rivets 7 are preferably employed to hold the renewable box shaped casting in position.

What I claim is:

1. A cast metal brake beam having its walls thickened at or near the point of possible wheel flange grinding.

2. A cast metal brake beam comprising a compression member, a tension member, and a trunnion, the walls of the tension member being thickened at or near the junction thereof with the trunnion.

3. A brake beam strut having a box like member inserted therein, which box-like member is provided with embossed pin hole openings, the strut having walls for strengthening said bcssed pin hole openings.

In testimony whereof I hereunto aflix my signature in the presence of two witnesses, this 14th day of May, 1913.

CHARLES H. IVILLIAMS, J R.

Witnesses:

E. T. WALKER, M. F. HnNrooN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents Washington, D. G. 

